Stock-ejecting device for punch presses



May 14, 1929. J. w. JQNES, JR 1,712,799

STOCK EJECTING DEVICE FOR PUNCH PRESSES Filed July 1, 1925 lnvemZor. lien CZ/LIOH Patented May 14, 1929.

UNI-TED STATES PATENT OFFICE.

JOHN W. JOI'TESQJB CHICAGO, ILLINOIS, ASSIGNOR TO INTERNATIONAL HAR- VESTER COMPANY, CORPORATION OF NEW JERSEY.

STOCK-EJECTING DEVICE FOR PUNCH: PRESSES.

Application filed. July 1,

This invention relates to punch presses and particularly to an attachment therefor for automatically ejecting or removing work from the work holding member thereof after the same has been operated upon by the punch or forming member.

Heretofore in the use of punch presses the operator was compelled to hold the work in place or move the work to and from position on the work holding member by his hands, which frequently resulted in injury to the operators hands. This was overcome to a certain extent by requiring the operators of these machines to use tongs or similar devices for moving the work into position to be acted upon by the punch or forming member, but this was objectionable in that it materially slowed up production.

it is an object of this invention to provide a mechanism which will automatically eject stock or work from the press after it has been operated upon by the punch or former, the device overcoming the necessity for employing tongs to move the work into posi tion without sacrificing the safety of the workman and injuring his hands.

Another object is to provide a simple and inexpensive device which may be readily attached to standard punch presses now in use for the purpose specified and without ail'ecting its operation and without altering its construction.

The preferred embodiment of the invention is disclosed in the accompanying sheet. of drawings wherein like characters ofreference denote like partsthroughout the several views, and in these drawings,--

Fig. 1 is a side elevation of a punch press showing the improved stock ejector attachment in association therewith;

Fig. 2 is a front elevation of the construction shown in Fig. 1; and

Fig. 8 is a detail, perspective view of a piece of work or stock to be operated upon by the press.

The standard punch press illustrated embodies a frame 10 having a table 11 supporting a work holding member or anvil 1.2, the frame above the table 11 having formed thereon at its sides a pair of guide members 13 and thereabove, as is usual in these machines, is journaled a shaft 14: ex-

tending through the frame and carrying at its rear end a pulley 15 around which is trained a driving belt 16. On the forward 1925. Serial No; 40,717.

end of the shaft M is fixed an eccentrically mounted wheel 17 which is connected by means of a pitman 18 to a second wheel 19 oscillatable within a block 20 to reciprocate said block, as will be observed, within the guide members 153. The lower end oi the block 20 has bolted therein a punch or forming member, or die head 21, of a shape which will cooperate with the particular kind of an anvil or die resting on the table 11..

So far there has been described a conventional punch press as now known in the art. In the operation thereof the workman must push the work alongthe anvil by hand, but this has been extremely dangerous, and the practice of employing guard cages around the dies has necessitated the employment of tongs or similar devices for insert ing the work to be operated upon by the press to obviate possible injury to the oper tors bands, which, of course, materially slows up production.

In the provision of the im iirovement of this invention now to be described, the oporator of the punch press cannot injure his hands and the production may be materially speeded up. The wheel 19, which oscillates freely in the reciprocating block 20, has i'astened thereto, as by means of a clamp 22 ad jacent its peripheral edge, a depending member 23 having adjacent its lower end a hook 524 which may cooperate with a piece of work, such the chain links 25 shown, to engage the under side oi? the work, as shown in Fig. 2, after the same has been operated upon by the punch or forming die 21 to eject or throw the same oil the anvil. The work shown for illustrating the invention herein is a chain link, as shown in Fig. 1

3, it having a link portion 26 and a right angularly extending portion 27 forming a chain link commonly employed in conveyer chains. In the casting process the portion 26 and the portion 27 of these links are not always right angular-1y disposed with re spect to each other and it, therefore, becomes necessary to employ a punch press for straightening them out. The dies shown in the drawings serve this purpose and it will, of course, be understood that for different kinds of work different kinds of dies will necessarily have to be employed. A chute 28 may be bolted, as shown in Fig. 2, to the frame to receive the chain links or other stock after they have been worked upon by the punch or former and ejected therefrom.

For different kinds of work it will, of

course, be understood thatthe depending member 23 may be differently formed. In the vpresent embodiment it is preferably made of fiat spring stock so that it will be resilient or flexible and is bent rearwardly,

' as shown in Fig. 1, so that it will effectively in its movement carries with it the depending V 20' member "23 which moves downwardly with the block 20 and the punch 21 during the punching or forming operation, and, after the punching or forming operation, oscillates in a direction and moves upwardly with the block 20 in a manner to ejector kick the Work from the anvil onto the chute 28, which will direct it into any suitable receptacle for receiving the work.

It should be understood that only the preferred embodiment of the invention has been herein illustrated and obviously the same may assume different terms and arrangements without departing from the Splllt of the invention as hereinafter claimed.

' What is claimed is:

' 1. In a punch press having a vframe, an-

anvil on the frame, apunch'adapted to cooperate therewith, operating means on the 'frame for reciprocating the punch, and a resilientflat spring member connected to the operating means and having a ,hoolc at its free end for ejecting stock from the anvil after the same has been worked upon-by the punch. I I

-52. In-a punch: press, a frame, a punch carrying block reciprocable'in the frame, I means for reciprocating said block including a wheel rocka-bly fitted in the block, an anvil,

and means on said wheel for directly engaging and stripping work from the anvil.

3. In a punch press, a frame, a punch carrying block reciprocable in the frame, means for reciprocating said block includin a wheel rockably fitted in the block, an auvi and an arm carried by and movable with said wheel for directly engaging and stripping work from the anvil.

4. In a punch press, a frame, a punch carrying block reciprocable in the frame, means for reciprocating said block including a wheel rockably fitted. in the block, an anvil, and a hook fastened directly to said wheel for directly engaging and stripping work from the anvil.

5. In a punch press, a. frame, av punch carrying block reciprocable in the frame, means for reciprocating said block including a wheel rockably fitted in the block, an anvil, and a flexible member carried by said wheel for engaging and stripping work from the anvil.

6. In a punch press, a frame, a much carrying block rcciprocable in the rame, means for reciprocating said block includin a wheel rockably fitted in the block, an am'ifi and a resilient arm connected to said wheel for engaging and stripping work from the anvil.

7. In a punch press, a frame, a punch carrying block reciprocable in the frame, means for reciprocating said block including a wheel rockably fitted in the block, an anvil, and a. flat spring arm secured to the wheel, said arm formed with a hook at its free end for engaging and stripping work from the anvil.

8. In a punch press, an upright frame, a punch carrying block vertically reciprocable in said frame including a wheel rockably fitted in the block, an anvil beneath the block, and a depending member above the anvil operable by said wheel for directly engagingand stripping work from the anvil.

In testimony whereof I aflix my signature.

JOHN W. JONES, JR. 

